Sungtae (Jacky) Park is research associate at the Council on Foreign Relations.
On January 2, President-elect Donald Trump tweeted that a nuclear North Korea capable of hitting parts of the United States "won’t happen." Yet, North Korea has been advancing its nuclear and missile capabilities at an alarming pace, and he will not be the first president to face the North Korean threat. George H.W. Bush, Bill Clinton, George W. Bush, and Barack Obama all attempted but failed to address the issue. Trump cannot continue the current path and expect different results. But, before looking for a different path, the new administration first should ask a number of hard questions that might better shed light on the nature of the problem and the decisions that could or should be made.